Here are a few options for a WordPress post_tag description in Traditional Chinese, catering to different levels of detail and the target audience:

**Option 1: Concise & General (Good for general understanding)**

> 了解燕子辨識技巧，輕鬆辨認不同種類的燕子，豐富你的賞鳥樂趣！

**Translation:** Learn the techniques for identifying swallows, easily recognize different species, and enrich your birdwatching enjoyment!

**Option 2: Slightly More Detailed (Good for interested birdwatchers)**

> 燕子辨識：提供關鍵特征、辨識要點，以及常見燕子種類的介紹，幫助你成為一位更棒的觀鳥者。

**Translation:** Swallow Identification: Provides key characteristics, identification tips, and introductions to common swallow species, helping you become a better birder.

**Option 3: Focus on Practical Application (Good for those starting out)**

> 燕子辨識實用技巧，包括燕子外形、飛行方式、棲息地等方面的辨別要點，讓你快速成為辨識燕子的專家！

**Translation:** Practical techniques for swallow identification, including key points for distinguishing swallows based on their appearance, flight patterns, habitats, etc., allowing you to quickly become an expert in identifying swallows!

**Option 4: Minimalist (If you prefer a short, sweet style)**

> 燕子辨識相關資訊及技巧。

**Translation:** Information and techniques related to swallow identification.

**Which option should you choose?**

* **Consider your audience:** Are they beginners or experienced birdwatchers?
* **Consider the article’s content:** Does it dive deep or give a basic overview?
* **Consider clarity and conciseness:** Generally, shorter descriptions are more effective in WordPress.

I recommend **Option 2 or 3** for a good balance of information and clarity if space is not a constraint, it provides detailed descriptions to your audiences making them able to understand better. You can also slightly modify these options to suit your specific post. Good luck!